Cisco CP-8821-K9-BUN Telephony Equipment
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CP-8821-K9-BUN Cisco Unified 8800 Series Wireless IP Phone Refurbished

Availability: In Stock
Part Number#: CP-8821-K9-BUN
List Price was: $1057.69
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Short Description:
CP-8821-K9-BUN Unified 8800 Series Wireless IP Phone World Mode With Battery Power Adapter | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

More Information

The CP-8821-K9-BUN Cisco Unified 8800 Series Wireless IP Phone is a wireless VoIP phone designed for use in enterprise environments. This phone is part of the Cisco Unified Communications portfolio and is designed to integrate with Cisco's Unified Communications Manager (UCM) for call control and management.

The part features support for wireless connections to the network through 802.11a/b/g/n/ac standards, providing flexibility in different network environments. It also includes a color display, support for multiple languages, and a variety of audio codecs, including G.711, G.722, and G.729. Additionally, it supports a range of features such as call hold, transfer, and conferencing, as well as access to Cisco Unified Communications Manager features such as presence, instant messaging, and voicemail.

This model is designed for use in enterprise environments, such as offices and call centers. It is ideal for users who need to be mobile and need to have access to all the features of their desk phone while on the move. It's designed for a high level of security, with the ability to authenticate through Cisco Identity Services Engine (ISE) and support for Cisco TrustSec.

High Performance

The CP-8821-K9-BUN Cisco Unified 8800 Series Wireless IP Phone is designed to deliver high performance in terms of audio and call quality. It supports wideband audio codecs such as G.722 and G.729 to provide clear and natural-sounding audio. It also includes advanced noise-cancellation and echo-cancellation technologies to help ensure that background noise and echo are minimized during a call.

The phone is also designed to provide a good user experience, with a high-resolution color display, intuitive user interface and an easy-to-use navigation. It also supports features such as call transfer, call hold, and conference calling to provide flexibility and efficiency during calls.

In terms of wireless performance, the phone supports both 802.11a/b/g/n and 802.11ac standards, providing fast and reliable wireless connectivity. It also supports Cisco CleanAir technology, which helps to improve wireless performance by identifying and mitigating RF interference.

Resiliency and High Availability of IP Phone

The CP-8821-K9-BUN Cisco Unified 8800 Series Wireless IP Phone is designed for resiliency and high availability. It supports Cisco's redundancy protocols such as Cisco Unified SRST and Cisco Unified SRST-SIP to ensure that calls can still be made and received in the event of a failure. Additionally, it supports wireless roaming to ensure that calls are not dropped when moving between wireless access points. The phone also features a durable design and can withstand harsh environmental conditions. It also supports Power over Ethernet (PoE) so that it can be powered through the network, eliminating the need for a separate power supply.

General Information about this Cisco CP-8821-K9-BUN

  • Manufacturer: Cisco
  • Model Number or SKU# CP-8821-K9-BUN
  • Product Series 8800
  • Product Model 8821
  • Product Name Wireless IP Phone 8821 World mode
  • Product Type Handset

Technical Information for Cisco 8821 Model IP Phone

Interfaces/Ports 8800 Series Wireless IP Phone

  • USB Yes
  • Headphone Yes

Features Intercom

  • Features Key Lock
  • Features Call Forwarding
  • Features Call Park
  • Features Call Waiting
  • Features Silent Mode
  • Features Voice Mail
  • Features Time & Date Stamping
  • Features Mute
  • Features Caller ID
  • Features Call Timer
  • Features Volume Control
  • Features Rechargeable Battery
  • Features (BLF) Busy Lamp Field
  • Features Music on Hold
  • Features Call Pick-up
  • Features Push-to-talk
  • Features Rugged
  • Features Call Transfer
  • Features Redial
  • Features Speed Dial
  • Features Speakerphone
  • Features Hold
  • Features Conference Call
  • Features Auto-answer
  • Features Vibrator
  • Features Message Waiting

Network and Communication

  • Frequency Range 2.41 GHz to 5.83 GHz

Display & Graphics

  • Screen Size 2.4 inch
  • Screen Type Color LCD
  • Screen Resolution 240 x 320


  • Buttons & Keys Speaker
  • Buttons & Keys Soft Key
  • Buttons & Keys On/Off
  • Buttons & Keys Navigation Key
  • Buttons & Keys Numeric Keypad
  • Buttons & Keys Volume Control
  • Buttons & Keys Mute Button


  • Cisco Unified Communications Manager: 9.1(2), 10.5(2), 11.0(1), and later
  • Cisco Unified Survivable Remote Site Telephony (SRST): 10.x, 11.x, and later
  • Cisco Unified Communications Manager Express: 10.x, 11.x, and later
  • Cisco Hosted Collaboration Solution (HCS): 9.x, 10.x, 11.x, and later

Dimension and Weight

  • Height 5.2 inch
  • Width 2.2 inch
  • Depth 0.7 inch
  • Weight (Approximate) 1 LBS

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.

Telephony technology deals with the interaction between two or parties that are physically distant. The interaction often involves electronic voice communication, videoconferencing, text messages, and faxing. Telephony has now evolved into the Internet sphere, allowing users to communicate via IP (Internet Protocol) networks. This is done at lower costs than traditional telephonic systems. IP telephonic systems can be found on a host of computing devices such as PCs, desktop computers, smartphones, and tablets.

Users need to invest in reliable, scalable, and robust telephony equipment to help meet enterprise needs. Every business needs to constantly communicate with employees, suppliers, and customers for improved business performance. There are a series of smart features of available telephony equipment that users can benefit from. These include real-time telephone calls, video conferencing, privacy protection, faxing, instant messaging, and more.

These high-end technologies are ideal for several organizations that require an improved approach to their telephony networking. That way, they can be sure of maximizing business mobility and continuity.

Several types of office phone systems are available to be employed by users. These phone systems run on different technology platforms. They can make use of VoIP, PBX, or analog. A user's telephone system choice will depend on the extensions, business applications, wiring, and budget. There are three major types that users can choose from, and they include KSU, PBX, and VoIP.

KSU (Key System Unit)

The Key System Unit is a multi-line telephony system that performs under a central control device. Present key system units now offer users with advanced features for businesses with up to 75 employees. These types of systems are often known as hybrid telephone systems. They incorporate the features of both key and PBX systems, offering improved efficiency. A great advantage of key systems is that the users can expand them as the business expands, and more employees are available.

PBX (Private Branch Exchange)

Larger businesses employ these types of telephony systems. They can accommodate well over 75 employees, and they have several advanced features standard them. These systems offer increased flexibility, which allows them to be used for complex operations in business environments. Their flexibility and customizable features ensure that they offer good value for money.

VoIP (Voice over IP)

This type is the latest telephonic system that allows businesses to connect in different locations. These locations can be within a locale or other places in the world. VoIP telephony equipment works by sending voice calls via the internet without the need for traditional telephones.

VoIP technology enables businesses to communicate with remote workers and branch offices. That is, users can place and receive calls anywhere in the world with the same number. Traditional VoIP technology allows companies to own and manage the telephony equipment themselves. On the other hand, the hosted VoIP system is controlled by a service provider.

Cloud-based telephony equipment manages and maintains a company's communication, relieving the IT department of such duties. That way, it frees up time and allows employees to focus on other important tasks.

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ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.

What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

What is not covered by our warranty?

The reason why our warranty does not cover any problem caused by the following conditions:

(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

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Individual product warranty mentioned on each item product description page/detail page.

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Worldwide Shipping Options:

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